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(No Model.)

` J. A. MILLER.

Patented Feb. 5, `1884;.`

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UNITED l rares gATENT @stica JOHN n. MILLER, or NEWARK, NRW JERSEY.

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SIPSCIFICATION'forming part of Letters' Patent No. 293,057, dated February 5, 1884.

` Application filed AprilO, 1883. (No model.)

f3 all wha/11, it `712,603/ concern:

Be it known that I, .Toi-IN A. llIILLi-IR, a citi- .zen of the United States, and a resident of Newark, `Essex county, New Jersey, have invented certain Improvements in Stoves, of which the following is a specilication.

My invention relates, in the main, to i1nprovements incookingstoves, and especially in that class of stoves shown and described in the patent of XV. A. Greene, No. 220,530, dated October 14, 1879. In these stoves apendent partition is arranged across the lire pot or chamber, and this `partition is made hollow,Y

the air entering its ends at the sides of the stove and escaping through perforations in its `lower edge.

My invention relates, in part, to the construction of this hollow partition, whereby the Y air iscaused to pass the entire length of the partition before it can enter the lire-pot, and whereby it becomes heated by contact with t-he walls ofthe partition.

, the back wall of the iire-pot, and to the pecuoutlet.

. sectional plan being indicated by line 1 1 in` In the drawings which serve to illustrate my` invention, Figure 1 is a vertical section vof a stove provided" with my improvements, the

Fig. v2. Fig. 2 is a horizontal section or sectional plan on line 2 2 in, Fig. 1. Fig.v 3 is a fragmentary transverse sectional view 011 a scale double that of Figs. 1 and 2, the plane of the section being indicated by line 3 3 in Fig. 1.

Let A represent the lfurnace or lire-pot, B the ash-pit, C the oven, and D the line over the oven, leading to the smoke and gas outlet E, all as ordinarily arranged in a Greene stove.

F is the pendent partition, which ,in the or dinary stove is merely a hollow wedge-like partition with open ends and perforations in itslower side or face. In my construction I divide the hollow or cavity of this partition into three parts (marked a, b, and c) by means of two dividing walls or partitions, cl df. The bottom of the middle chamber, c, is perforated with a row or rows of small holes,

through which the air passes to combine with the gases in the fire-pot, as in the Greene stove. The partitions d and d extend from opposite ends of the partition F, but not the entire length 0f the same, leaving an Opening, e, which connects chambers a and b at one end, and a similar opening, e', which connects chambers a and c at the other end. The chamber or passage b opens out at f, Vat one side o f the stove, and the chamber or passage c opens lout at f on the other side of the stove. It `will be readily seen that the air entering at f `must pass along Z entirely across the stovebefore it can enter a through the opening e, and the air entering atf must pass along c entirely across the stove before it can enter a at c. Thus, it will also be seen, the air is heated by its contact with the exterior highly-heated walls of F before it can enter and commingle with the gases flowing under the partition F on their way from the fire-pot to the gas-outlet. It also relates, in part, tothe construction of Besides the well-known advantages which arise from heating the incoming air before its mixture with the gases from the fuel, my construction serves to keep the temperature of the side walls of the partition F below that which ,would injure them. `This results from the constantly-flo\ving currents of air on the inside of .these walls, which currents are continually extracting the heat from the latter. This enables me to employ cast-ironin the construction of the partition F, whereas if exposed to the intense heat of the fire-pot without this protection such partitions would soon bc warped and destroyed by the fierce heat. I have shown the chambered passages?) and c of the same dimensions, but this is not necessary. 'Indeed, as lthe heat on the front side of the partition is usually greater than at the back, the passage c might be the largest, as its heating capacity is the greater.

I have shown the partition Fas constructed of cast-iron; but it might be molded from reclay or other refractory material, and, instead of being arranged to pass through the sides of the stove and rest thereon, it might be arranged to rest 0n the fire-brick lining g of the nre-pot. Ordinarily in such stoves the back wall of the fire-pot has been constructed of a plain inclined fire-brick or tile. n This permits IOO the gases from the fuel to escape too readily into the iiue or passage D, and before they can mingle with the air from the partition F. To prevent this I employ a deflecting or bafiie tile, G, which has a perpendicular or nearly perpendicular face, h, ,which serves to check or baffle the gases and deflect them upward toward the top of the stove, where they can combine with the hot air from the partition F.` The upper surface, h', of the tile G is preferably inclined and convex, as shown in Fig. l. Some ofthe gases and uneombined carbons from the fuel will still escape into flue D, and when it is desired that the fire should have a free draft, as at starting, I leave this flue unobstructed; but in order to deflect the gases upward against the top of the stove and to consume the uncombined vgases and carbon that may have escaped combination, I provide a baffie-damper, II, arranged to turn up, as shown in full lines in the drawings, so as to partly close the flue D, or to turn down, as shown in dotted lines in Fig. 1, so as to leave the iiue clear. p On the free edge of this damper I'inount a perforated pipe, t', the open ends of which, when the damper is raised, register with apertures jj in the side walls ofthe stove. Thus, when the damper is raised, the gases must pass over its top on their way to the gasoutlet E, and they then mingle witli the air which enters pipe z', and escapes through the perforations therein. In order to close the apertures j when the damper is turned down, I provide quadrant-plates k 7c, fixed to the damper adjacent to the sides of the stove, which, when the damper is turned down, rest over'and elose the apertures, as will be well understood. These plates k also serve as stops to maintain the damper in its erect position. Fig. 3 shows the handle Z, whereby the damper is actuated.

Instead of taking air from the outside'into partition F, the air might be taken from the ash-pit B by vertical pipes or flues arranged next to the side walls of the stove.

I do not wish to eoniine myself to the precise details lof construction herein shown, as they may be varied to some extent without departing materially from my invention--as, for example, the plates 7c might be replaced by other means for closing the apertures j.

' instance, simple gravity wickets might be sus- For pended to the stove-wall over the apertures,

and these wickets be arranged so as to be displaced by the movement ofthe damper.

I am aware that zigzag flues for heating the air and discharging it into the fire-boxes of stoves at the back have been before employed, and I make no broad claim to this. My iiue is arranged within the pendent partition F, which separates the fire-box into two chambers. t

I am also aware that baffle-dampers have been before employed, and these I do not claim, broadly.

Having thus described my invention, I claiml. Thel pendent partition F of a stove, arranged to divide the fire-box into two ehambers, and provided with a longitudinal chamber with a perforated bottom, and passages arranged parallel to said chamber within said partition F, adapted to receive air at the side or sides of the stove, the said parallel passages having communication with the said chamber at its end or ends, whereby a zigzag passage is formed in said partition F, within which the incoming air is heated before it reaches the combustion point in the stove, substantially as set forth.

2. The pendent partition F of a stove, arranged to divide the fire-box into two chainbers, and, provided with a central chamber with a perforated bottom, and passages Z1 and c, adapted to receive air from opposite sides of the stove, the said passages having communic-ation with the central chamber at the ends ofthe partition opposite to the points where the air enters, substantially as set forth.

3. The combination, with the stove walls or sides provided with apertures j, of the damper H, provided with a perforated pipe, t', arranged to register with said apertures when the damper stands erect, and means, substantially as described, for closing said apertures when the damper is lowered, as set forth.

In witness whereof I have hereunto signed Y my name in the presence of two subscribing witnesses.

JNO. A. MILLER.

Witnesses:

JOHN MoN'rErrH, Jr., g JOHN A. MILLER, Jr. 

